Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The "lovely red Vega" of the legendary record-settling pilot.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

A nostalgic bibliographic gem.

The walls of the iconic dome are hollow and have a secret stairway.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

This grand gothic brewery has been pumping out suds for over a hundred years.

Home to items never before seen by the public.

One of the oldest producers of hand-folded fortune cookies still uses its original secret recipe.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A huge musical instrument played by the ocean.

This poignant display is now a memorial to these regionally extinct species.

This impressive scene portrays the elusive forest giraffe of Central Africa.

Creating this diorama spurred naturalist Carl Akeley to begin advocating to protect the apes.

This taxidermy scene brings the struggle for survival in the Indian jungle to a quiet corner of a Manhattan museum.

This magnificent herd of stampeding elephants has been frozen in time for over a century.

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.